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<a name="odtone.mihf_internals.event_subscribe_unsubscribe_optimization"></a><a class="link" href="event_subscribe_unsubscribe_optimization.html" title="Event subscribe/unsubscribe optimization">Event
      subscribe/unsubscribe optimization</a>
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<p>
        In order to optimize the process of subscription/unsubscription of events
        at the MIHF, the number of messages between the local entities (i.e., between
        the MIHF and Link SAPs.) was reduced. When a MIH-User requests for an event
        subscription, if a subscription has been made previously by other entity,
        the MIHF subscribes the MIH-User and immediately replies to it, otherwise
        the MIHF firstly tries to subscribe the event with the Link SAP or the peer
        MIHF.
      </p>
<p>
        The method to optimize the unsubscription mechanism is similar to the subscription
        one and it aims for the same objectives. When a MIH-User requests to unsubscribe
        an event in a Link SAP the MIHF unsubscribes it locally. The MIHF unsubscribes
        the event with the Link SAP or the peer MIHF only if the event has no more
        subscriptions.
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        <span class="inlinemediaobject"><img src="../.././images/subscribe.png" alt="subscribe"></span>
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